pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-98760-4261_Lady_Jemima_Johnstons_Strathspey.ps) >>/Users/jc/w/tmp/Tune-98760-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CSR/4261_Lady_Jemima_Johnstons_Strathspey.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Form_98760.log 1050 Log file, useful mostly for debugging
Tune-98760-4261_Lady_Jemima_Johnstons_Strathspey.abc 1017 ABC music file with the extracted tune(s)
Tune-98760-4261_Lady_Jemima_Johnstons_Strathspey.ps 39818 PostScript
Tune-98760-4261_Lady_Jemima_Johnstons_Strathspey.txt 1017 Plain-text file with the extracted tune(s)
Tune-98760-get.log 6575 Log file, useful mostly for debugging
These files should be available for 24 hours.